/*
 * Copyright 2024-2025 Embabel Software, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.embabel.agent.spi.expression.spel

import com.embabel.agent.spi.expression.LogicalExpression
import com.embabel.agent.spi.expression.LogicalExpressionParser

/**
 * Logical expression parser for Spring Expression Language (SpEL).
 * SPEL expressions are prefixed with "spel:".
 */
class SpelLogicalExpressionParser : LogicalExpressionParser {

    override fun parse(expression: String): LogicalExpression? {
        if (!expression.startsWith(PREFIX)) {
            return null
        }

        val spelExpression = expression.substring(PREFIX.length)
        return SpelLogicalExpression(spelExpression)
    }

    companion object {
        const val PREFIX = "spel:"
    }
}
